Stuart Staples, Technical Manager, Scotts
The increase in soil surface pH caused by potassium nitrate is known to encourage the onset of Fusarium and Take-All patch.
The trial of wetting agents tested the effects of two types - a penetrant in winter to remove moisture from the surface and a water conservation agent in summer.
The fungicide treatments saw the application of both systemic and contact products at pre-determined dates four times during the trial.
Trial Results The results confirm that ITM promotes
Dr. Ruth Mann (STRI)
healthier turf. Results for the fertilisers trial were averaged across a year of data. Some plots had a surge of disease over the winter period where others had very little. Disease pressure on plots where Sierraform GT slow-release fertiliser was used reduced by 21% compared with a reduction of 3% on those where potassium nitrate was applied, indicating that the choice of fertiliser you apply can significantly affect the chance of a disease outbreak in your turf. Data from the wetting agent trial showed that use of an H2Pro programme reduced disease pressure by 18% versus
Julie Wheater (STRI)
the untreated plots and more importantly, when a programme of slow- release fertilisers and wetting agent was implemented, a reduction in disease pressure of 29% was achieved. Historically, wetting agents have only been advised for drought stress and the prevention and treatment of dry patch. This study also clearly demonstrates the benefits of using them in winter to remove moisture and surface water, reducing humidity and preventing pathogen attack. In the three-way trial, which combined the use of slow-release fertiliser, wetting agent and Effect liquid iron, the results
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